Question

A rocket ship is 100 m in length when measured before leaving the launching pad. When in flight, a ground observer measures its length as 75 m. The velocity of the rocket ship is:

Answer 1

Hello friend,

Solution :-

Let, L1 = 100m , l2 = 75m

Used this formula

Here, v is the velocity of the rocket ship and c is the speed of light in vaccum.

Now, 100/75 = 1/root (1-v^2/c^2)

4/3 = 1/root (1-v^2/c^2)

Squaring both sides,

16/9= 1